ID:15872 Input port <name> of DDIO_IN primitive "<name>" must be driven from an I/O IBUF with no more than <number> delay chain primitives in between

CAUSE: The specified DDIO_IN atom is not connected properly. It should be driven by an I/O IBUF primitive with no more than the specified number of delay chain primitives in between.

ACTION: Check your design to make sure the DDIO_IN atom is properly connected.